Motor terminal binding post



Feb. 17, 1948. w. L. HANSEN ETAL MOTOR TERMINAL BINDING POST Filed Oct. 25, 19 .6 2 Sheets-Sheet l INVENTORS WILLIAM. L HANSEN H A R R Y s. HEY

MANSON im oul mi/n. ATTORNEYS Feb. 17, 1948. w. L. HANSEN EFAL MOTOR TERMINAL BINDING POST Filed Oct. 25, 1946 2 Sheets-Sheet 2 INVENTORS WILLIAM I..HANSE[V. BQARRY G. MANSON,

p I -l- W ATTORNEYS Patented Feb. 17, 1948 ton, Indi', assignors to Hansen Manufacturin'g Company Incorporated,

poration of Indiana Princeton-,- Ind.; a cor- Application October-25, 1946, Serial No. 705,770 6 Claims. (Cl. 172-278) This invention pertains to improvements in terminal binding posts, and is particularly dire'ctedIto-an improved terminal binding post for synchronous electric clock motors,

One of the objects of this invention is to provide an improved terminal bindingpost'arrangementforsynchronous motors of a type, for example, as shown in Patents 2,256,211 and 2,298,373.

Another object of this invention is to provide an improved terminal binding post arrangement for synchronous motors which'is supported on the field magnet of the'motor, and is. located closely adjacent to the field coil in such a way-as to facilitate attachment of the field coil terminalsto the binding posts.

Still anotherobiect of this invention is to provide a terminal binding post comprisin a threepiece' laminated structure mounted on thefield magnets of the synchronous motor and supported. by means of the shading coil and the'field mag-- net coil spool in position on the motor;

.Still another object of this invention is topro vide' a terminal binding 'post' for asynchronous motor in: which all of the component partsmay' be made on-a punch press.

Further features and advantages of this invention will appear from a detail description of the drawings in which:

Figure l'isa fragmentary plan viewshowing theapplication of the terminal binding postdevice, incorporating the features of applicants invention, to a synchronous motor.

Figure 2 is a fragmentary section on the line 21-4 at Figure 1. I

Figure 3 is a fragmentary section of the line 3-3 of Figure 2, showing the top'plate member of the terminal binding post on the line 3-3'of Figure 2.

Figure 4 is a section on the lined-4 of Figure 2, showing the intermediate terminal holding plate.

Figure 5 1s asectiontonthe line S -f Figure 2, showing thebottom plate.

Figure dis a detail view'of one of the terminal binding post pieces;

Figure-'7 isa fragmentary enlargedsection on pieces l2 and I3 integrally arranged around the periphery of disc To the other end of the core I0 is fixed a series: of radially extending pole pieces I45 The'usual rotor |5is arranged tom-- tate'with its-cylindrical portion I6 presented be tween 'the' pole-pieces l2-| 3 and the pole-pieces M in a mannerasset forth in the above mentioned patents. An undulating shading coil I"! is fitted around theoutside-of the pole pieces |3 and the inside of'the pole pieces l2 to provide the necessary automatic starting impulse-for the rotor l5. The shading coil I1 is fitted to nicely" slide on the various pole pieces l2 and Hi, and'is positioned by engagement of its-lower surface l8" with the inner surface IQ of the disc Around'the core lllis the field coil spool 20 hav ing a smaller diameter flange 2| and a larger diameter flange 22between which is Wound the field coil 23. The-lower flange 2| is pushed down against the surface l9 ofthe disc locate'the' coil 23- with respect to the core l0.

When an alternating current is impressed on the a coil 23', an equivalent alternating flux islnduced in the magnetic corelll and the pole pieces |2--|3* and th'e polepieces I 4, this alternating field be tween the pole |5 of the motor.

Thevery nature of the magnetic coil 23-repieces servingto drive the rotor quires that it be composed of a-large number of turns ofvery fine small-diameter wire with the result th-at difiiculty is presented in connecting the usual -v0lt applianc cord leads to such:

fine wire in an efficient manner and without damage or breakage of the fine wire leads fromthe coil; Applicants with their present novel arrangement have provided a terminal binding post arrangement for the appliance cord by which theleads from-the magnetic coil 23 may be positively and dependably attached to the line current at all times Thisterminal' binding post arrangement com prises'fa'bottom"plate memberxu best shown in. Figu're 5;, having an inner arcuatev surface 25' which is presentedz'closely adjacent to the coil 23; asxcan best be 'seen in Figures 1 and 2. An arcuate slot 28 is formed centrally of the member 24 having a :surface :2! the pole .piecesgagin the outer surfaces Endisurfaces side tedges'oi'the pole pieces 12 and I3 so as to accurately and firmly position the-member 24 on thefieldmagnet pole-pieces I21 and I3. The outer ends of the member- Zlhave surfaces 3| and32= respectively engaging'otheroi the pole piecesllto properly engaging the inner faces of |2fand l3, and a surface. 28, en-- of these pole pieces. 29rand13flof this slot engage the:

and I3 as shown in Figure 1, and there are also suriaces 38 and 34 which engage the inside portions of these other pole pieces to give added stability, accuracy, and rigidity of positioning of the member 24 on the field magnet structure of the motor.

The lower plate 24 is slipped over the pole pieces 12 and I3 and moved downwardly until its underneath surface 24a engages the top surface Ila of the undulating shading coil I! which,

because of its radial extent due to the undulations, provides a surface for accurately positioning the member 24 in exact radial'position relative to the core l and coil 23. The member 24 may also be supported by the top edge 36 of the usual case or cover 3! provided for the motor structure.

0n top of the plate member 24 is placed an intermediate terminal carrying and holding member 38 which has a slot 39 like that of the slot 26 in the member 24, and having notched portions .40 and 41 like the notched portions 3I-33 and 32-34 of the member 24, and functioning in the same way to cooperate with the pole pieces l2 and I3 to accurately position and hold it on the motor structure. The member 38 is pressed down and firmly brought into engagement with the top surface of the member 24 and presents cut-out portions 42 which are adapted to receive the terminal binding post pieces 43 shown in Figure 6. Each of these pieces contain the usual binding post screws 44, threadedly mounted at 45 in the outward projecting end portions 43a of the binding post pieces 43. These members 43 nicely fit by their configuration into the mating openings 42 so that the inward ends 43b project in a convenient location for the leads 54 from the field coil 43 to be brought out and bent into the holes 45 in the ends 4317 and se-' cured therein by a drop of solder.

After the leads 54 have thus been secured in the holes 45, the top plate member 46 is then placed over the leads and soldered connection 45 so as to firmly pinch or bind the leads 54 be-' tween the member 38 and the top member 46.

This top member fits under the surface 22a. of

the upper flange 22 of the magnet coil spool 20,

as'best seen in Figure 2. The member 46 is accurately positioned relative to the members 24 and 38 by its arcuate surface 41 and side surfaces 48 and 49 which cooperate with a pair of pole pieces l2 and i3.

After the entire binding post assembly has thus been mounted on the motor structure field pole pieces and shading coil, and the final top piece 46 has been placed in position under the surface 22a of the coil spool flange 22, a suitable rivet 50 may be passed thru all three of the members 24, 38 and 45, as shown in Figure 7, so

as to securely bind the entire unit togetheras a rigid, firm structure, to which the power supply leads may readily be applied under the terminal screws4'4 without any possible damage resulting.

tothe fine'wire leads 54'coming'from the coil 23. It is also to be'noted that the five members comprising thejterminal binding post arrangement are each composed of flat, strip material which may readily be fabricated by punching on apunch press, while the whole assembly together forms a rigid, solid structure which facilitates the initial connecting of the appliance cord leads to the motor.

'While the apparatus herein disclosed and described constitutes a preferred form of the inventiomit is tobe understood. that the apparatus a 4 is capable of mechanical alteration without departing from the spirit of the invention and that such mechanical arrangements and commercial adaptations as fall within the scope of the appendant claims are intended to be included herein.

Having thus fully set forth and described this invention, what is claimed .as new and desired to be secured by United States Letters Patent is:

l. A terminal binding post device for a synchronous electric motor having a field magnet and a field coil associated with said magnet, a pair of terminal binding posts connected to the leads of said coil, and means for mounting said binding posts rigidly on said field magnet adjacent to said coil, including a pair of laminated plate members snugly fitting a pole portion of said field magnet, binding post terminals supported in said laminations, and a third lamination adapted to enclose and hold said leads from said coil rigidly in soldered position on said terminals.

2. In a terminal binding post device for an electric synchronous motor having a magnetic core, a magnetic field member mounted on one end of said core and having outer pole pieces disposed axially in a substantially cylindrical path,

a bottom plate member having means engaging said pole pieces to rigidly secure said member to 4 said field magnet, a second plate member mounted on said field magnet and having cut-awayportions for positioning and holding a pair of binding post terminals, means for soldering the leads from a field coil on: said core to said binding post 3. In a synchronous electric motor having a;

magnetic core, a field magnet member moimted on one end of said core having outer pole pieces disposed axially in a substantially cylindrical path, a spool mounted around said core, a field magnet wound on said spool, and binding post means for applying line current to the leads of said coil comprising a bottom plate member,

nicely fitting over the pole pieces of said field magnet, a second plate member mounted on said pole pieces having cut-out portions to accommodate terminal binding posts, means for soldering the leads from said coil to said binding post terminals, and a top plate member fitting under one disc of said spool and adjacent the pole Pieces of said field magnet, and means for securing said plates together.

4. In a terminal binding post arrangement for a synchronous electric motor having a cylindrical core piece, radially extending field magnet portions on each end of said core, axially extending,

pole'pieces from one of said portions, a field coil spool mounted around said core, a field coil wound on said spool, an undulating shading coil asscci-x ated with said pole pieces,- and terminal binding I post means for the leads of said field coil come prising a laminated support member mounted on said pole pieces and confined axially thereon by said shading coil and said field coil spool, and terminal binding post members held by said 1aminated support member connected to the leads of said coil. I

5. In a terminal binding post device for a synchronous electric motor having pole pieces, a field coil, and a shading coil associated with said pole pieces, a laminated structure consisting of ai series of punched-out plate members adapted to hold a pair of terminal binding posts mounted on said pole pieces and confined thereon by said shading coil and a fiange of a winding spool associated with said field coil, means for connecting the leads of said coils to said terminal binding posts, and means for securing said laminated structure together after connecting said leads from said coil to said binding posts.

6. In a terminal binding post arrangement for a. synchronous electric motor having axially extending pole pieces, a field coil spool, an undulating shading coil associated with said pole pieces, a laminated structure for forming said device comprising a bottom plate member fitting over said pole pieces and adjacent said shading coil, a second intermediate member having cutaway portions to support and position a pair of terminal binding posts, means associated with said posts for securing leads from a field coil wound on said spool, and a top plate member engaging said spool to secure said leads to said device, and means for binding all three of said members together in a rigid unitary structure,

5 and binding post screw means for attaching a power supply cord to said terminals.

WILLIAM L. HANSEN. HARRY G. MANSON.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS 

